25531321121412 has 96 divisors (see below), whose sum is σ = 61139724140544. Its totient is φ = 8289746755200.

The previous prime is 25531321121377. The next prime is 25531321121417. The reversal of 25531321121412 is 21412112313552.

It is not an unprimeable number, because it can be changed into a prime (25531321121417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30768633 + ... + 31587519.

It is an arithmetic number, because the mean of its divisors is an integer number (636872126464).

Almost surely, 2^{25531321121412} is an apocalyptic number.

It is an amenable number.

25531321121412 is an abundant number, since it is smaller than the sum of its proper divisors (35608403019132).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25531321121412 is a wasteful number, since it uses less digits than its factorization.

25531321121412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 819369 (or 819367 counting only the distinct ones).

The product of its digits is 14400, while the sum is 33.

Adding to 25531321121412 its reverse (21412112313552), we get a palindrome (46943433434964).

The spelling of 25531321121412 in words is "twenty-five trillion, five hundred thirty-one billion, three hundred twenty-one million, one hundred twenty-one thousand, four hundred twelve".